I've been envying my *nix brethren for having Wget for a long time. To get the contents of a web page or download a file using http I had to use workarounds that took more than one command - either creating a new System.Net.WebRequest or using a BITS module.
Well - Since I started using PowerShell v3 I can be lazy once more, thanks to Invoke-WebRequest.
For example, say you want to fetch the contents of my blog's frontpage:

(Invoke-WebRequest 'http://backslasher.net').Content

Or maybe you'd like just the title?

(Invoke-WebRequest 'http://backslasher.net').ParsedHtml.title

Or if I want to download google's logo to a file:

Invoke-WebRequest 'https://www.google.com/images/srpr/logo4w.png' -OutFile ~\Desktop\omgLogo.png

Proxying through Fiddler was never easier:

Invoke-WebRequest 'http://Some.Site.com' -Proxy 'http://localhost:8888'

And lastly, if you want to hit your SharePoint site's homepage, but you need to use kerberos authentication:

Invoke-WebRequest 'http://SharepointServer/BestSite' -UseDefaultCredentials

Easy webbing!